/*	$NetBSD: search.h,v 1.12 1999/02/22 10:34:28 christos Exp $	*/
/* $FreeBSD: src/include/search.h,v 1.4 2002/03/23 17:24:53 imp Exp $ */

/*
 * Written by J.T. Conklin <jtc@netbsd.org>
 * Public domain.
 */

#ifndef _SEARCH_H_
#define _SEARCH_H_

#include <sys/cdefs.h>
#include <machine/ansi.h>
#include <sys/types.h>

typedef struct entry
{
	char *key;
	void *data;
} ENTRY;

typedef enum {
	FIND,
	ENTER
} ACTION;

typedef enum {
	preorder,
	postorder,
	endorder,
	leaf
} VISIT;

#ifdef _SEARCH_PRIVATE
typedef struct node
{
	char *key;
	struct node *llink, *rlink;
} node_t;
#endif

struct hsearch_data
{
	struct internal_head *htable;
	size_t htablesize;
};

#ifndef __compar_fn_t_defined
#define __compar_fn_t_defined
typedef int (*__compar_fn_t)(const void *, const void *);
#endif

__BEGIN_DECLS
int hcreate(size_t);
void hdestroy(void);
ENTRY *hsearch(ENTRY, ACTION);
int hcreate_r(size_t, struct hsearch_data *);
void hdestroy_r(struct hsearch_data *);
int hsearch_r(ENTRY, ACTION, ENTRY **, struct hsearch_data *);
void *tdelete(const void *__restrict, void **__restrict, __compar_fn_t);
void tdestroy(void *, void (*)(void *));
void *tfind(const void *, void **, __compar_fn_t);
void *tsearch(const void *, void **, __compar_fn_t);
void twalk(const void *, void (*)(const void *, VISIT, int));
__END_DECLS

#endif /* !_SEARCH_H_ */
